Overflow means for radiators



Aug. 18, 1936. .1. D. HARRIS 2,051,705

- OVERFLOW MEANS FOR RADIATORS Filed May 1, 1933 IN VENTOR.

BY W W ATTORNEY? Patented Aug. 18, 1936 UNITED STATES 2.051105 OVERFLOWMEANS FOR RADIATORS Joseph D. Harris, Detroit, Mich., assignor to McCordRadiator & Mfg. 00., Detroit, Mich., a corporation of MichiganApplication May 1, 1933, SerialNo. 668,682

13 Claims. (01 229-35) This invention relates to vent and overflow meansfor radiators for motor vehicles.

The general purpose and object of the invention is to provide anoverflow means particular- 5 ly adapted for radiators of the type havingrelatively shallow top tanks as made necessary by reason of the presentlow hood designs to prevent or reduce the loss of water through the venttubes.

10, In radiators of this character, the top tanks have in many casesbeen reduced to such small capacity and are located so close to theenclosing hood and shell that venting through the filler necks asheretofore employed with deeper tanks 15 :is not practical for thereason that the filler necks are so short or low to fit either under thehood or terminate substantially flush with the shell that the inlet endsof the vent tubes in the necks are so close to the water levelin thetanks 20. that excessive loss of water occurs in the use of theradiators.

1 In accordance with my invention, I provide the top tank of theradiator with an overflow chamber disposed on the outer side of the tankbeyond whereby the inlet end of the vent or overflow tube connectedwith'said chamber is at the highest possible point above the liquidlevel in the tank to prevent or reduce the loss of water from so; theradiator due to its rise by expansion by heat from the engine oragitation or surging in the travel of the vehicle over a roadway or'tothe sudden stopping and starting of the vehicle or change in itsmomentum in the use of the so- 35' called free wheeling devices in thevehicle drive.

Specifically, my invention comprises an overflow chamber on the top-wallor roof sheet of the top tank and extending above the same whereby thechamber and the inlet end of the overflow tube connected therewith areso disposed above the tank that they are not easily or freely reached bythe water when surging in the tank. I employ an apertured partitionbetweenthe chamber and the tank to bafile the water as 5 it surges inthe tank .and thus prevent'its' free flow or entrance into the chamberto reach the vent or overflow tube for escape therethrough. The overflowchamber may be provided by a suitably shaped member applied to the toptank either as a separately formed part or stamping or by pressing aportion of the tank wall upwardly to provide the chamber. 7 7 V Theinvention consists further in the matters hereinafter described andclaimed. 5 In the accompanyingdr'awing:

the filling opening and extending above the same vided with theoverflowmeans of my invention; 5

Fig; 2 is a top plan view of the top tank of the radiator taken on line2-2 of Fig. 1;

Fig. 3is an enlarged vertical sectional view taken on line 3-3 of Fig.2;

Fig. 4' is a similar view showing a modified 10 form-of construction tobe hereinafter described; and I Fig. 5 is a top plan view of thestructure shown in Fig. 4, parts being broken away and in section,respectively.

wAs shown in the drawing, the radiator I has a. core Zand a relativelyshallow top tank 3. The latter extends to the rear of the core 2 underthe hood 4 of the engine, where said tank has a filling opening 5 in itstop wall or roof sheet 6, the fllling opening 5 being under the hoodwhen the latter is closed. The neck 1 about the opening'and to which theclosure cap 8 is attached, is relatively-short or low as shown, to fitbeneath the hood. I Arranged on the outer side of the top tank '3 andcarried thereby is a member 9 forming an overflow chamber ID for theradiator. Said chamber is divided from the tank by an interposedpartition 'I'I having apertures l2 which '30,

con'nectthe chamber with the interior of the tank as shown; An' overflowtube [3 is connected-with the chamber l0 and leads to a. discharge pointat'oradja'cent the lower end or bottom of the radiator as in designs ofthis character. 1 The member 9 in the form shown in the drawing" isdome-shaped and is provided on the top wall or-roof sheet 6 of the tank.Member 9 exten'dsabov'e' the tank and is preferably disposed thereon atthe highest possible point above the 40 liquid level in the tank. Whenthe top 'wall of the tank is arched as indicated in Figs. 1 and 2, thedome 9 is disposed at the highest point of the arch which-in 'the designshown is midway between the'ends l4, M of the'tank. The dome 9 may belocated adjacent the upright front wall I5 of the tank as shown in thedrawing, in which case the dome is located under the outer casing orshell l5 of the radiator. Said shell in the design shown has its rearmargin ofiset inwardly to providea seating and supporting flange I! forthe adjacent front edge of the hood 4.

The domef 9 could be arranged on the tank, as for example, adjacent itsrear wall,;in which case'itwould be disposed under the hood 4 asindicated by the dotted lines a in Fig. 2. The location of the dome inthe positions referred to is possible because the filling opening 5 isofiset to one side of the transverse center line of the tank. With thefilling opening so located, the tank cannot be filled above the level ofsaid opening, thereby providing a free space in the tank below the domefor the liquid in the radiator to rise due to expansion and also tosurge to some extent without entering the dome.

The dome as shown in Figs. 1 to 3, is made independently of the top tankas a separate stamping, afterward secured to the top Wall of the tank atthe place desired by solder through its marginal or base flange H3, orthe dome may be pressed out of the top wall 6 of the tank to beintegrally connected therewith as shown at 905 in Figs. 4 and 5. Exceptfor this manner of connection with the tank, the dome 9a. is similar tothe dome 9 and provides an overflow chamber In as before. I

When the dome is pressed out of the top wall of the tank, it isnecessary to employ a separately formed partition member l9 which issecured as by solder to the .inner surface of the roof sheet 6 about themargin of the dome as indicated in Figs. 4 and 5. The partition I9 isprovided with one or more apertures 20 to connect the chamber formed bythe dome 9a with the interior of the tank. Likewise, an overflow tubel3a is connected with the dome 9a and extends into the same from theexterior of the top tank so that its inlet end is at the highestpossible point above the communication between the overflow chamber andthe interior of the tank, the same as in the previous construction. Inthe latter, the partition member it forms a part of the tank wall overwhich the dome shaped member is secured.

The vent or overflow tube in both forms of construction as stated,extends into the dome from the exterior of the tank. When the dome islocated on the top wall of the tank as shown in the drawing, the tubeextends into the dome above this top wall. It may be extended along thefront wall lb of the tank to one of the ends [4, as shown in FigsJl and2, before continuing down to the bottom or lower end of the radiator.The manner in'whioh the tube is led to its discharge point is notmaterial to my invention.

By thearrangement shown anddescribed, the filling opening and its neckare not employed in venting the radiator, consequently, the vent andoverflow means may be positioned to extend above the top wall of thetank and the filling opening and thus be disposed at the highest pointpossible above the liquid levelin the tank to prevent or reduce the lossof water from the tank in the use of the radiator. With the ventingmeans separate and distinct from the filling opening, the vent means maybe located at any desired point on. the tank, either under theshell l6as shown, or under the hood. as herein described. The dome or chambermay be relatively low as indicated to fit either under the shell or thehood, and in extending above the tank and its filling opening, willeffectively serve the purpose for which it is desired, namely, toprevent the loss of water especially from shallow orsmall capacity toptanks as in the radiators required for low hood designs.

In the form of radiator shown in Figs. 1 and 2, the toptank has aninlet-fitting 2| in its portion extending to the rear-of the core and bywhich fitting the radiator isconnected in the watenjacket-ei theengine.The radiator has an outletfitting at the lower end for connection withsaid jacket as in structures of this general character.

The details of construction shown and described may be variously changedand modified without departing from the spirit and scope of 5 myinvention, except as pointed out in the appended claims.

I claim as my invention:

1. In a radiator for motor vehicles, a top tank having a fillingopening, means providing an 10 overflow chamber for the radiator on theouter side of the top tank and carried thereby, means connecting thechamber with the interior of the tank independently of said fillingopening, and an overflow tube connected with said cham- 15 ber.

2. In a radiator for motor vehicles, a top tank having a fillingopening, means providing an overflow chamber for the radiator on theupper side of the top tank in ofiset relation to the filling 20 openingand extending above the same, means connecting the chamber with theinterior of the tank independently of said filling opening, and anoverflow tube connected with said chamber.

3. In a radiator for motor vehicles, a top tank 25 having a. fillingopening, means providing an overflow chamber for the radiator on theupper side of the top tank in oilset relation to said filling openingand extending above the same,

means connecting the chamber with the interior 30 of the tankindependently of said filling opening, and an overflow tube connectedwith the chamber and extending into the same from the exterior of thetank.

4. In a radiator for motor vehicles, a top tank 35 having a fillingopening in its top wall, a domeshaped member carried by the top wall ofthe tank in offset relation to said filling opening and extending abovethe same to provide an overflow chamber for the radiator, meansconnecting the chamber with the interior of the tankindependently of thefilling opening, and an overflow tube connected with said chamber.

5. In a radiator for motor vehicles, a top tank having a filling openingin its top wall, a dome- '5; shaped member carried by the top wall ofthe tank in offset relation to said filling opening and extending abovethe same toprovide an overflow chamber for the radiator, a partitionmember between the tank and chamber and having an aperture connectingthe chamber with the interior of the tank independently of the fillingopening, and an overflow tube connected with said chamber.

6. In a radiator for motor vehicles, a top tank 55 having a fillingopening, a dome-shaped member made independently of the tank and securedthereto on its top wall in onset relation to said filling opening toprovide an overfiow' chamber for the radiator, the portion of the topwall of 9- the tank over which the member is secured dividing thechamber from the tank and having an aperture connecting the chamber withthe interior of the tank independently of the filling opening, and anoverflow tube connected with 5 said chamber.

7. In a radiator for motor vehicles, a top tank having a fillingopening'in its top wall, a portion of said wall exterior of said fillingopening being pressed upwardly to provide a dome-shaped over- 7 flowchamber for the radiator above said wall, a partition member secured tosaid wall and dividing the chamber from the tank, said partition havingan aperture connecting the chamber with the interior of the tankindependently of the filling opening, and an overflow tube connectedwith said chamber.

8. In a radiator for motor vehicles, a top tank having a filling openingtherein, means providing an overflow chamber on the tank and extendingabove the same and said opening in lateral ofiset relation thereto, apartition dividing the chamber from the tank and having an aperturetherein connecting the chamber with the interior of the tankindependently of said opening, and an overflow tube connected with saidchamber.

9. In a radiator for motor vehicles, a top tank having an arch-shapedtop wall having a filling opening therein to one side of the highestpoint of the arch, means providing an overflow chamber on said top wallat the highest point of the arch and extending above the same, apartition dividing the chamber from the tank and having 7 an aperturetherein for connecting the chamber with the interior of the tank, and anoverflow tube connected with said chamber.

10. In combination, a radiator having a header provided with a filleropening, an overflow chamber communicating with the radiator interiorthrough means other than the filler opening, said means acting to resistpassage of fluid from the interior of the radiator into the chamber, anda vent conduit communicating with said chamber.

11. Incombination, a radiator having a header provided with a filleropening, an overflow chamber communicating with the radiator interiorthrough means other than the filler opening, said means beingsubstantially coplanar with the top of said header, and acting to resistthe passage of fluid from the interior of the radiator into the chamber,and a vent conduit communicating with said chamber.

12. In combination, a radiator having a header provided with a filleropening, an overflow chamber communicating with the radiator interiorthrough means other than the filler opening, said means acting to resistpassage of fluid from the interior of the radiator into the chamber, anda vent conduit communicating with said chamber, the end of said ventconduit lying above the top of said header.

13. In a radiator having a relatively shallow top tank, a filler openingtherein, and vent means 20

